Lamp attachment for show-cases.



R. B. BENJAMIN.

LAMP ATTACHMENT FOR SHOW CASES.

APPLICATION FILED OCT 31, 1913- Patented. May 30, 1916.

2 SHEETS-SHEET I.

R. B. BENJAMIN.

LAMP ATTACHMENT FOR SHOW CASES.

APPLICATION FILED OCT. 3!. 1913.

T. 9 T 9 T "Y m Patent-e01 May 30, 1916.

2 SHEETSSHEET 2.

T ITEM flTATFfl FATFFIT UFFIMA.

REUBEN B. BENJAMIN, OF CHICAGO, ILLINOIS, ASSIG-NOR TO BENJAMIN ELECTRIC MANUFAGTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

LAMP ATTACHMENT FOR SHOW-GASES.

msaoi'r.

Specification of Letters Patent.

Patented May 30, 191%..

To all whom it may concern:

Be it known that I, REUBEN B. BENJAMIN,

' a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements" in Lamp Attachments for Show-Cases, of which the following is a full,

- lamp attachments for show-cases and the like.

One of the objects of my invention is to provide an improved attachment whereby the various sockets in which the lamps are adapted to be secured and the means for connecting the electric wires to the binding posts arranged in the reflector all form one complete structure to which it is only necessary to attach the leading-in wires for the circuit.

For the purpose of disclosing my invention I have illustrated one embodiment thereof in which Figure 1 is .a front plan view of my showcase attachment; Fig. 2 is a sectional view taken on the line 22 of Fig. 3; Fig. 3 is a sectional view taken on the line 3-3 of Fig. 1; Fig. 4 is a view showing two sections of the reflector trough joined together, in the event it is desired to increase the length of the trough. Fig. 5 is an enlarged plan view of the lamp socket; Fig. 6 is an enlarged end view thereof; Fig. 7 is a sectional view taken on the line 77 of Fig. 5, and Fig. 8 is a sectional View taken on the'line 88 of Fig. 7. I

In the embodiment of the invention illustrated in the accompanying drawings I provide a reflector trough 1 which may be of any suitable material, such for instance as brass or nickel. This trough is arc-shaped in cross-section and at its two edges is headed, as at 2 to provide wire channels for the conductors. The inturned edge of the bead projects inwardly suflicientlvfar to form a flange for assisting in holding the lamp receptacles and the bindlng post receptacle in position. The lamp receptacle which is adapted to be secured wlthln said trough comprises a one piece porcelain cylindrical casing 3 open at each end, and havthe accompanying drawings, in

ing'a central web 4 for the support of the threaded shells and center contacts of the lamps. Arranged in each end of the casing is a threaded shell 5 to receive the threaded base of an electric lamp, the oppositely disposed shells being held in position by suitable screws 6 which pass through the central web and screw into inturned flanges 7 on theshell. In addition to the threaded shell there is .a spring center contact 8 for each of the lamps which takes the form of a turned down tongue on the end of the con- .tact plate 9. This plate is secured upon the supporting plate 10 which is supported in position by screw 11 passing through from the exterior of the casing. The threaded shell contact is electrically connected with the exterior of the casing by a screw 12 which engages the inturned tongue 13 of a plate 14. The exterior of the casing at about midway of its ends is provided with a pair of integral transversely extending flanges which together with a portion of the casing form a base 15. The top of this base has oppositely disposed pairs of diverging grooves 16 and arranged within said grooves are a pair of contact plates 17 and 18 with which the screw 11 for holding the center contact in position and the screw 12 for making the electrical connection with the threaded shells engage. Each one of these contact plates 17 and 18 is provided with a binding post 19 and 20 to which the conductor wires are attached. The twin socket thus formed is arranged to be supported within the trough 1. In placing the socket in position' the casing rests in the bottom of the trough while the inturned flanges of the beads 2 engage over the base 15 so as to prevent the lamp from being dislodged from its position. It will be noted that the beads of the trough on each side of the base provide a channel through which the electric wires 21 run and these wires may be brought in from this channel through the grooves 16 in the base and connection made with the binding posts.

For holding the base in its position against movement and for covering the binding posts, I provide a cover plate-22 which is formed of insulating material, preferably hard fiber. This plate fits over the base and the flanges on the beads whereby the flanges are clamped between the base and cover plate. On one end of this plate is secured a clamp 23 which fits over the bead and to -the opposite end is secured a removable clip 24 of the same construction, the clips being secured to the base by screws 25 WlllCh pass through the clips and into the base, suitably threaded nuts being arranged on the under side of the base to receive these screws. By this arrangement after the electric connections have been made on the lamp socket the cover plate and its clips may be readily secured in position, which clips not only maintain and hold the cover plate in position but also aid in preventing the displace- 5 ment of the lamp receptacle. These clips and the cover also provlde a readily removable portion by wh1ch the binding posts of the lamp receptacle may be suitably exposed for attaching the conductor wires to the binding posts without removing the lamp receptacle.

At the end of the trough I arrange a binding post base 26 which carries the binding posts for the leading-in wires. This base is formed of an insulating block adapted to fit withinthe trough and beneath the inturned flanges 2 of the beads, the ends of the base being chamfered as at 27 so that they will take the configuration of the sides of the 0 trough. The top of this insulating base has oppositely disposed pairs of transverse grooves 27 and 28, and meetin these transverse grooves are longitudina grooves 29 and 30. Arranged in grooves are plates 31 35 secured in position by suitable screws. The plates eachcarry two binding posts 32 and 33. One of these binding posts 32 provides a post to which one of the wires in the trough is' attached. The other binding post 40 33 provides a post to which one of the leading-in wires 1s attached. These binding posts are covered by a cover plate 34 similar in construction to the cover plate for the lamp receptacle. The end of the trough is preferably closed by a telescoping cap 35 which fitsover the end thereof and suitably closes the same.

In the event one section of the trough is not sufliciently long a number of sections may be joined together by telescoping one section over the other, as desired, or abutting the-two sections together and having a lamp receptacle arranged at this point, half of the lamp receptacle base fitting within each section of the trough. The clamps for hold ingthe cover plate in position will serve to hold the two sections together as shown in Fig.- 4c. The same sort of a joint may be made, if desired, by a binding post base.

50 While I have shown and described one embodiment of my invention it will be understood that various changes may be made thereinwithout departing from the spirit of the invention as set forth in the appended 55 claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a device of the character described, the combination with a metallic trough having beads on its two edges to accommodate conductor wires and conductor wires in said beads, of a lamp receptacle mounted in said trough having a base adapted to engage beneath flanges on the trough, and bindingposts on said base for connecting the conducting wires with said receptacle.

2. In a device of the character described, the combination with a metallic trou h beaded on its edges to form conduits for t e 30 conducting wires, of a lamp receptacle mounted in said trough having a base adapted to engage beneath flanges on the trough, binding-posts on said base for connecting the conducting wires with said receptacle, and a removable cover plate for said base for exposing said binding posts without removing the receptacle.

3. The combination with a metallic trough beaded on its edges to form conduits for conductor wires, of an insulatmg base mounted in said trough and adapted to engage beneath flanges on said trough, binding posts on said base for the leading-in wires, a pair of binding posts on said base 5 for the conducting wires, a lamp receptacle mounted in said trough having an insulating base arranged to engage beneath the flanges of said trough, and blnding posts on said insulating base arranged to be connected with the conducting wires.

4. In a device of the character described, the combination with a metallic trough having inturned flanges on its edges, of a lamp receptacle arranged in said trough havin an insulating base, said base being arrang to engage beneath said flanges, binding-posts on said base, a cover plate for said base adapted to inclose said binding-posts and fit over the flanges of the trough, and clamps arrranged to engage said trough and be secured over the cover plate to holdthe cover plate in position and hold the receptacle in position in the trough.

5. In a device of the character described, the combination with a metallic trough beaded on its edges, of a lamp receptacle having an insulating base arranged to engage under flanges formed on said beads, binding-posts mounted on said base, a cover plate for inclosing said binding-posts, clips for holding said cover plate in position arranged to engage over the beads of the trough, and means for securing said clips to the base.

6. The combination with a cylindrical one-piece porcelain casing having a transversely extending base, of threaded lamp receivers and center contacts arranged in the opposite ends of said casing, binding-postsso lot mounted on said transversely extending base electrically connected with said threaded lamp receivers and center contacts and a metallic trough having inturned flanges'on its edges engaging over the edges of the base.

7. The combination with a metallic trough having inturned flanges at its edges, of a lamp receiver comprising a one-piece porcelain cylindrical casing provided with a transversely extending base, lamp receivers and center contacts arranged within said casing, and binding-posts mounted upon said base electrically connected with said receivers and contacts, said transversely extending base being arranged to engage beneath the flanges of the trough for holding said receptacle in the trough.

8. In a device of the character described, the combination with a metallic trough having in-turned flanges on its edges, of a binding-post base mounted in said trough comprising an insulating block having its edges engaging beneath said flanges, binding-posts mounted on said block, and a cover plate for said binding-posts mounted on the face of said block and arranged at its edges to clamp the flanges of the trough between it and the base.

9. In a device of the character described, the combination with a metallic trough beaded on its edges to form conduits for the conductor wires, a binding-post base mounted in said trough comprising an insulating block arranged at its edges .to engage beneath flanges formed on the edges of said beads, binding-posts for the conductor wires mounted on said base, binding-posts for the leading-in wires mounted on said base, a cover plate for said binding-posts arranged at its edges to clamp the flanges of the trough between it and the base, clips adapted to engage over the beads of the trough and be secured to the base for holding the cover plate and base in position.

10. A lamp receptacle comprising a onepiece porcelain cylindrical casing having a transversely extending base, lamp-receiving shells and center contacts mounted in saidreceptacle, said base being recessed to receive binding-post plates connected with the threaded shells and center contacts, and a cover plate adapted to be secured upon said base for inclosing the binding-posts and electrical parts mounted on said base.

11. In combination, a metallic trough, a lamp supporting device having a base member extending between and detachably engaging opposite edges ofsaid trough and also having means for supporting a lamp in said trough, and a binding-post mounted on the outer face of said base.

12. In combination, a metallic trough, a lamp supporting device havin a base member extending between and etachably engaging opposite edges of said trough and also having means for supporting a lamp in said trough, and a binding-post mounted on the outer face of said base, said base having a channel in its outer face leading from the edge of the trough to said binding-post.

- 13. In combination, a metallic trough, a

, lamp supporting device havmg a base member extending between and detachably engaging opposite edges of said trough and also having means for supporting a lamp in said trough, and a binding-post mounted on the outer face of said base, said base having a channel in its outer face leading from the edge of the trough to said binding-post, said trough having a bead on itsedge and a conductor wire" in said bead and channel and connected to said binding-post.

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses.

REUBEN B. BENJAMIN. Witnesses:

"CHARLES Gr. COPE,

E. R. KING. 

